Stop passing raw pointers to base::Value API in c/b/ui

chrome/browser/ui/webui/options/chromeos/core_chromeos_options_handler.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_OPTIONS_CHROMEOS_CORE_CHROMEOS_OPTIONS_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_OPTIONS_CHROMEOS_CORE_CHROMEOS_OPTIONS_HANDLER_H_
 
 #include <map>
+#include <memory>
 #include <string>
 
 #include "base/macros.h"
 #include "base/memory/linked_ptr.h"
 #include "chrome/browser/chromeos/settings/cros_settings.h"
 #include "chrome/browser/ui/webui/options/core_options_handler.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
 namespace chromeos {
 namespace options {
 
 // CoreChromeOSOptionsHandler handles ChromeOS settings.
 class CoreChromeOSOptionsHandler : public ::options::CoreOptionsHandler,
                                    public content::NotificationObserver {
  public:
   CoreChromeOSOptionsHandler();
   ~CoreChromeOSOptionsHandler() override;
 
   // ::CoreOptionsHandler overrides
   void RegisterMessages() override;
-  base::Value* FetchPref(const std::string& pref_name) override;
+  std::unique_ptr<base::Value> FetchPref(const std::string& pref_name) override;
   void InitializeHandler() override;
   void ObservePref(const std::string& pref_name) override;
   void SetPref(const std::string& pref_name,
                const base::Value* value,
                const std::string& metric) override;
   void StopObservingPref(const std::string& path) override;
-  base::Value* CreateValueForPref(
+  std::unique_ptr<base::Value> CreateValueForPref(
       const std::string& pref_name,
       const std::string& controlling_pref_name) override;
 
   // OptionsPageUIHandler implementation.
   void GetLocalizedValues(base::DictionaryValue* localized_strings) override;
 
   // content::NotificationObserver implementation.
   void Observe(int type,
                const content::NotificationSource& source,
                const content::NotificationDetails& details) override;
@@ skipping 23 matching lines @@
   // Currently selected network id.
   std::string network_guid_;
 
   DISALLOW_COPY_AND_ASSIGN(CoreChromeOSOptionsHandler);
 };
 
 }  // namespace options
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS_CHROMEOS_CORE_CHROMEOS_OPTIONS_HANDLER_H_